Oriental beetle vs scarabaean

Oriental beetle and scarabaean both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oriental beetle	Yes	No	No	No
scarabaean	Yes	No	No	No

As nouns, scarabaean is a hypernym of Oriental beetle; that is, scarabaean is a word with a broader meaning than Oriental beetle:

Oriental beetle: introduced into United States from the Orient; larvae feed on roots of sugarcane and other grasses
scarabaean: any of numerous species of stout-bodied beetles having heads with horny spikes

Other hypernyms of Oriental beetle include scarabaeid, scarabaeid beetle.

Oriental beetle (noun)	scarabaean (noun)
introduced into United States from the Orient; larvae feed on roots of sugarcane and other grasses	any of numerous species of stout-bodied beetles having heads with horny spikes